Children’s teeth become black may be due to dental caries or tooth pigmentation caused by dental caries treatment measures are mainly to repair caries, maintain good oral hygiene habits, extraction treatment, etc., tooth pigmentation treatment measures are ultrasonic scaling as well as sandblasting cleaning. 1. Dental caries: children’s teeth first from yellow to black is a common manifestation of dental caries, and then the teeth may have dental tissue defects. In this case, you need to go to the dentist in time to do the repair. Need to use fluoride toothpaste brushing, to develop a good habit of brushing in the morning and evening and rinsing after meals, is conducive to the recovery of the teeth, the serious need for tooth extraction treatment. 2. Teeth pigmentation: Due to the roughness of the tooth surface itself, teeth are not aligned, not easy to clean, cleaning is not timely enough, resulting in food debris attached to the teeth, which is the main cause of teeth pigmentation. To treat tooth pigmentation you can use ultrasonic to clean the teeth, which can effectively remove the pigment on the surface of the teeth. Then there is sandblasting, which can efficiently and quickly remove the pigmentation on the surface of the teeth. There may also be other factors that cause children’s teeth to turn black, it is recommended to go to the hospital in time to check, improve the examination to clarify the cause of the disease, to give targeted treatment or treatment. Usually pay attention to maintain good oral hygiene.